... Knob 2.roller massage 3.CE,CCC,ROHS certification 4.Bubbles and Vibration . 5. PTC heater ZY-518 foot spa AC220V /50HZ ... , to play the role of massage care.3, vibration massage - Foot Massager with vibration at the bottom of massage motors and hundreds ... disease resistance. 4, ozone removal of athlete's foot, foot odor, athlete's foot - Foot massage device can produce ozone bubbles, dissolved in water ...